The looping of the template for the lagging strand enables a dimeric DNA polymerase III holoenzyme at the replication fork to synthesize both daughter strands. (Courtesy of A. Kornberg. From L. Stryer, Biochemistry, 4th ed.he 3â²âââ5â² exonuclease action of DNA polymerase III. Note that this exonuclease activity takes place at the 3â² end of the growing strand (and is therefore 3â²âââ5â²). The coordination of exonuclease activity with strand growth helps to explain why replication is in the 5â²âââ3â² direction.
McAllen is the twenty-first most populous city in Texas and the largest city in Hidalgo County, Texas. It is located at the southern tip of Texas in the Rio Grande Valley (not a geographical valley) and is part of the Southern United States.
Terrell County is a county located in the U.S. state of Texas. As of the 2010 census, its population was 984, making it the eighth-least populous county in Texas. Its county seat is Sanderson. The county was named for Alexander W. Terrell, a Texas state senator. Terrell County is one of the nine counties that comprise the Trans-Pecos region of West Texas. It is the setting for Cormac McCarthy 's novel No Country for Old Men, and the Academy Award-winning film adaptation of the same name.